You sound about the same era as me. I'm 35 now, have been using Linux since 2001 until now. Just remember, that when you started using Linux, it was about 10 years old. It's now been 20 years since then - double the time has passed since you started, compared to what came before it. Some stuff is going to change. Sure some of those commands come from older Unixes but the point still stands :)

Some of your complaints are practical but 2 specific ones I'd note: "ip" has been the tool you wanted to use since even the mid 2000s - ifconfig wouldn't even show you every IP on an interface since then unless it had an alias. Something that may help you make the transition is the "-brief" (-br for short) switch which gives a very compact simple output that is a little easier to visually parse. If you're using a systemd-networkd system, "networkctl status" is also handy.

For systemd, I have never been bitter about it, but while it has changed many commands and interfaces or ways you work, if you just dig a tiny bit below the surface it has SO many modernsations and conveniences that more than make up for it. Make your own rosetta stone for your top commands, but then look around at all the other things systemctl, etc, offer and find some pluses to make the pain worth it :)

See also: https://github.com/certsimple/rosetta-stone